Vol XXIII, pp. 109-110 July 23, 1910 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



J.ERA LONGICORNIS LUCAS REFERRED TO THE 

 GENUS STENETRIUM. 



BY HARRIET RICHARDSON. 



[Collaborator, Division of Marine Invortobratcs, U. S. National Museum.] 



In 1849 Henri Lucas described a new species of Jxra which 

 he called J. longicornis. Recently in referring to the Explora- 

 tion Scientifiqiie de I'Algerie, where the description was pub- 

 lished,* I noticed that the form does not belong to the genus 

 Ji£ra as now understood, but should l)e referred to the genus 

 Steiietrium Has\vell,t a genus described much later, in 1881, 

 and of which S. armatum. is the type. 



In 1886 Bovallius X established the genus Jaiiwa for Jsera 

 longicornis, and also placed Jsera filicomis Gxxxhe § in this genus. 

 Jamna therefore must now be considered a synonym of Stene- 

 triiim. Beddard || also in 1886 remarks that Jfera longicorixis 

 has been wrongly assigned to the genus Jsera, but does not 

 place it in any other genus. Jsera longicornis was first recorded 

 from Algeria, but has since been found at Lesina in the Adriatic 

 according to Heller. H 



Jsera filicornis Grube was considered by Heller to be identical 

 with Jsera longicornis. Finally, in 1893, Stebbing** refers to 

 Jamna longicornis, thus recognizing the genus Jamna. 



Dr. H. J. Hansen, tt in his conspectus of the genus Stenetrium, 

 mentions all tlie species described before 1905, but seems to have 



* I, p. 66, IV, pi. 6, fig. 4. 



f Proe. Linn. Soc. New Soutli Wales, V, p. 470, pi. XIX, fig. 1. 



t Bihang till K. Svenska Vet.-Akad. Handlingar, XI, No. 15, pp. 22-M. 



§Die Insel Lussin, 1864, p. 75. 



II Challenger Report, XVII. 



IT Verb. K. K. Zool.-bot. Gesellsch. in Wien, XVI, 1806, p. 783. 



** Hist. Crust., 1893, p. 379. 



■h- Proc. Zool. Soc. London, l',)04. 11, Pt. 2, 190ri, i)p. 316-330, pi. XIX, tigs. 2a-'J/(. 



28— Proc. Biol. Soc. Wash., Vol. XXIII, I'JIO. (109) 



